Air conditioning apparatus



- .10, 1935" .J. H. TEXTORIUS ET AL AIR CONDITIONING APPARATUS Filed Ap ril 18, 1955 5 Sheets-Sheet l JNVENTORS.

JOSEPH EBRODER/CK By JDH H-TEXTUR/US AT TORWEYT Dec. 10, 1935. J. H. TEXTORIUS ET AL 2,023,622

AIR CONDITIONING APPARATUS Filed April 18, 1935 I 5 Sheets-Sheet 2 1s- 5' IF 27 2 -15 72', a (5 1, k3 7, 6

INVENTDRS.

f JOSEPH F: BRDDER/L'K BY JOHN H- TE X TOR/U5 ATTORNEY:

Dec. 10, 1935- J; H; TEXTORIUS ETAL 2,023,622

AIR CONDITIONING APPARATUS 'Filed April 18, 195-3 5 Sheets-Sheet 3 BY Jag/v H. TEXTUR/US Dec. 10,1935. J. H. TEXTORILIS ET AL 2,023,622

AIR CONDITIONING APPARATUS Filed April 18, 1935 5 Sheets-Sheet 4 INVENTORS F n- JUEEFH EBRUUER {E K '72 BY JUH H-TE'XTURIUS me m was;

EM a en J.H. TEXTCJRIUS ET AL AIR CONDITIONING APPARATUS Filed April 18, 1935 5 Sheets-Sheet 5' 1. Q sz 51- if,

' e I IM Water Cooler INVENTORSZ JOSEPH F. BRUDER/CK B! .70 H. TE X TU RlL/E w M TTORNEY.

Patented Dec. 10, 1935 UNITED, STATES 2.023.622 AIR CONDITIONING APPARATUS John H. Textorius and Joseph F. Broderick,

New York, N. Y.

Application April 18, 1933, Serial No.,666,718

'1 Claims. (Cl. 257-3) Our invention relates to air conditioning apparatus especially designed and constructed to accomplish the treatment of air or gas to remove therefrom dust, bacteria, foreign matter, etc.;

and to establish the air or gas at desired predetermined humidity and temperature. The invention provides an apparatus capable of use in industrial, residentiahpublic or private institutions or buildings regardless of size.

One of the principal general objects of the invention is to provide apparatus for the above purposes in the nature of a compact unitary machine which can be installed complete in the basement'or other part of a building remote from l5 the area or rooms to which the air is to be delivered, thus facilitating economy of construction and operation as well as conserving valuable space in many instances.

Another object of the invention is to provide 20 apparatus or a machine of the above type, especially but not exclusively designed for low pressure (frictional) operation, and capable of treating a large volume of air in a relatively small space. One of the important features accom- 25 plishing this object being the downward substantially vertical flow of air through a spray chamber against an upward and angularly disposed spray of water, the spray being so directed and the spray chamber so formed that the impinge- 30 ment of the spray and resultant back-lash increases the turbulence and atomization of the spray in the spray chamber.

Another object of the invention is to provide for spraying either hot or chilled water or water 35 of selected intermediate temperatures within the chamber, and means for automatically controlling the temperature of the spray responsive to the temperature and humidity of the conditioned air.

40 Other objects and advantages of the invention include the provision of a machine or apparatus of the character mentioned capable of either humidifying or dehumidifying the air; means for automatically'maintaining the condition of the 45 treated air at predetermined humidification and temperatures; and to provide such apparatus in the form of unitary device capable of being groupedto take care of the needs of building of various sizes. 50 While we have thus far mentioned use of the invention chiefly in connection with the treatment of air, we wish it tobe understood that the same is capable of use industrially for the treatment of various gases for the purpose of main- 65 taining them at predetermined relativehumidity and temperature either byhumidifying them, dehumidifying, heating or cooling them. Furthermore, apparatus embodying our invention may be used as a heating plant.

All of the obj e'ct's and .advantages of the inven- 5.

.des'cription'of the accompanying drawings, in

which Fig. 1 is a front elevation of the exterior of a. 10 machine embodying our invention;

Fig. 2 is a view on the line 22 of Fig. 3;

Fig. 3 is a view'tak'en on the line 33 of Fig. 2;

Fig. 4 is a view taken on the line 4-4 of Fig. 2;

Fig. 5 is a view taken on the line 5-5 of Fig. 2;

Fig. 6 is a view taken on the line 66 of Fig. 2;

Fig. 7 is a view similar to Fig. 1 with a portion of the front of the housing broken away;

Fig. 8 is a view taken on the line 8-8 of Fig. 7

Fig. 9 is a view taken on the line 9-9 of Fig. 7

Fig. 10 is a detailed sectional view of a heater or cooler for the spray water;

Fig. 11 is a front perspective view of a machine which may be used as a heating plant and showing the arrangement of parts on the interior of the machine diagrammatically; v

Figs. 11a and 11b are perspective views of thev fan assemblies removed from the machine;

Fig. 12 is a diagrammatic view of the automatic control means for the heating and cooling elements of the machine showing the electric circuits;

Fig. 13 is a small top plan view showing how the units may be grouped; 1

Fig. 14 is a side'view of a machine with a separate refrigerating unit coupled thereto or positionedin proximity thereto; and

Fig. 15 is a complete diagrammatic view of the heating, cooling, and spraying means.

- Referring to the drawings, and particularly 40 at present to Fig. 1, the numeral l designates the front panel of the housing for the app'aratus, said panel being provided with a plurality of openings closed respectively by doors 2, 3, 4;

5 and 6. The front panel 'I is preferably of metal as also are the sides, back, and top of the apparatus, and the exterior of the housing may be finished in the style of the usual refrigerator finish or may be covered by baked enamel or a plastic heat insulating material. The walls of the housing are also preferably lined with a heat insulating material such as generally used in casings of refrigerators or refrigerating apparatus, such lining not being shown in the drawings. The decrs '5 and 5 may be hingedly conthe machine at opposite sides thereof there may be collars 8, two at each side of the machine,

and similar collars 8 on each side panel of the machine for delivering the conditioned air to conduits for conveying it to the proper rooms or parts of the building.

Referring to Figs. 2-4;; itwill be noted that plates 9 are mounted between the front and back of the, machine and which, in connection with .the sides III of the stack, divide the top part of the machine into spaces or compartments l I and I2, at opposite sides of the stack. At each side of the housing are flues l3, I3 and I4, I4',(Fig.

6) formed by partitions 15 between the walls 9.

and the sides I of the housing. Each flue communicates with openings surrounded by collars l and 8'. At this point, we would mention that such of the collars 8, 8, as are not connected to conduits leading. to rooms to receive the treated air may be closed by suitable caps or plates I "not shown. There are preferably eight collars,

four on top and four collars on the sides, and

' '1 it would be preferable to use either the four top 35 collars and close the top ones.

collars andfclose the side ones or use the side This assumes that the capacity of the machine is suflicient to deliver a required amount of air to four rooms,

but it will be understood that this is purely illustrative and that the capacity .of the machine may be such as to care for more or less rooms.

However, we consider it highly desirable to provide the machines of a unitary character capable of supplying air say to four rooms, and rather than build a larger machine to takecare of more rooms,- to simply arrange the units" side by side so that two unitswould furnish air to eight rooms, three units to twelve rooms, etc. This illustration of course assumes rooms of usual standard size such, for instance, as school rooms, and large residences, and, of course, a. machine capable of supplying conditioned airfto such rooms in requisite numberof cubic feet per minute could supply six, eight or more rooms of smaller capacity.

The lower ends of the. plates in forming the sides of the stack 1 (Figs. 2 and 3) are flanged diagonally outward as at 16, and have their lower ends rigidly connected to the plates 9 by any suitable means. It is possible, of course, instead of flanging or bending the plates l to provide flanges It, to connect-separate plates between the ends of the plates l0 and 9, to form bottoms of the compartments II .and I2, which as hereinafter described, may be utilized for the housing of cooling, heating or other elements.

Thefront of the stack T is formed by' plate I! mounted parallel to the front l"of the casingand connected between the plates Ill. The lower end of'the plate i1. is' flanged similarly to the plates l0 and connected to the front of the housing. Thus, a space I! is provided between the front of the stack 1 and front I of the housing,

said space communicating with the chambers I] 1 and and also being adapted to receive part nected to the housing, as indicated by the letter of the heating or cooling means.- It 'will be noted that the stack consists of an inverted substantially funnel-shaped member secured between the plates 9 and I0 and front wall I, and having its top end projecting through and above the top plate 20 of the casing.

Within the stack I and adjacent its lower ends are heater. tubes or coils 2i (primary heaters) which may be connected, as hereinafter explained, to a suitable source of steam supply.

Also, within the stack and above the heaters 2| are the coils 22, which are hereinafter referred to as the primary cooler, and'which are connected to a suitable source of chilled water, brine at low temperature. or which may be used as 1;

direct expansion refrigerator coils using any suitable commercial refrigerant.

Belowthe flanges l6, l8, of the stack, that is, below the flaring end of the stack and across the chamber S, which is defined by the front and back of the housing and the lower ends of the plates 9,'there is mounted a bafiie 23 having irregular passages 23' through which the air passes upon entering the chamber S from the stack.

.and above the trough is a spray nozzle 25 connected to pipes hereinafter described for conducting water of predetermined temperature to the nozzle, so that the water will issue from the nozzle in the form of a spray directed upwardly and outwardly towards the top of the. chamber S, as shown in Figs. 2 and 3. The position of the nozzle is preferably centrally of the chamber S, so that the spray will contact the upper .portion of the walls of the chamber, and the lower surface-of the baflie 23 creating a back-lash and resulting in further breaking up of the spray into a mistat the top of the chamber immediately 4'5 beneath the baflle'23. The impingementof the spray against'the walls and bailie and further breaking up of the spray creates an additional 'turbulence in the spray chamber immediately at the point where the air enters through the bailie.

One of the advantages of the construction and arrangement of the parts defining the spray chamber and the manner of projecting the spray affords a relatively short length of travel of the" air through the spray chamber, whereby a relatively great volume of air can be treated in a relatively small and compact spray chamber.

Through each of the walls 9 adjacent the bottom of the spray chamber, are openings 26 leading to compartments containing fans F which rooms or desired parts of a building through conduits connected to collars 8 or 8'. There is preferably a fan to supply each flue.

We have previously explained that the door 3 may be opened to give access to the baffle 23 for cleaning the'passages therein. The fans F and operating mechanism therefor and mechanism for circulating the water are mounted behind the doors 5 and 6, and by opening the doors access may be had for. such parts for the purposes of repair at any time. Also, the door 4 may be removedto give access to the spray chamber S and the parts therein, and the doors 2 may be opened for access to the parts housed in the compartment i9.

Referring particularly to Figs. 2, 3, 7-10, it will be noted that within the space l9 between the stack and the front of the housing is a pipe 28, leading from any suitable source of steam supply, and to which is connected a header 29 having branches a, a, b, b, c, c, (1, cl, e, e, and ,f. The branches a and a are connected by pipes 30, 30 respectively to the primary heaters 2i. The branches b, 11', (see Figs. 7 and 15) are connected by pipes 3i, 3! respectively to the front secondary heaters 28, 28; the branches 0, c, are connected by pipes 32, 32 to the back secondary heaters 28, 28; the branches d, d, are connected by pipes 33, 33 to the front upper secondary heaters 29, 29'; and the branches e, e',,are connected by pipes 34, 34 to the rear upper second- .ary heaters 29, 29. Eachof the heaters is provided with an opening 39 to receive a return pipe.

'The branch ,1 is connected to a pipe 35 leading through the water heater 3% shown in detail in Fig. 10, as comprising a jacket having a coupling 31 to receive the spray water inlet pipe and the couplingor nipple 38 receive an outlet pipe. The water passing to the spray nozzle may be diverted through the heater when required in accordance with conditions and automatic means hereinafter described, Fig. 10 showing the steam pipe within the heater and around which the water circulates. We wish it to be understood that we may employ electric water heaters of known and avail.- able types or any other. heating medium for the water instead of the steam coil shown and described.

' There is provided in connection with each or the extensions a, a, b, b, c, c, d, axe, e, a valve, each operated by an electro-m'agnet EM so that all of the primary and secondary heaters may be its collectively and individually placed in communication with or closed from communication with the source of steam supply through the pipe 2%. Each of the electro-magnets EM is connected in circuit with and operated by thermostats. The operation of the valves to control the flow of steam to the primary and secondary heaters and or other refrigerant from any suitable type of refrigerating apparatus. Pipes 42 and 313 are located in the space or chamber it and are. connected preferably to the same apparatus as the pipes 40 and ll to conduct the refrigerant to and from the primary coils 22 in thestack l. Pipes 44 and. 455 also lead to and from the refrigerating apparatus to conduct the refrigerant to and from the secondary cooling coils 2V in the lines at the right side of the machine. The respective groups of pipes to, ilk-42, 43,- -4, E5, may be provided with automatically operated valves similar to the steam valves, or expansion valves actuated in response to thermostatic elements located in the air terminal spaces, so that the refrigerant may be conducted simultaneously through all of the coils both primary and secondary or through the primary alone or through the secondary coils alone. I

From the description thus far given, it will be seen that the air entering through the stack 1 may be either heated by the primary heaters 2! or chilled by the primary coil 22 and then drawn by the fans through the baille and spray and openings 26 and sent on to the conduits leading .to the air terminal spaces, and the air leaving the fans may further be chilled bythe secondary coils 27, or heated by either or both of the sec-= ondary heaters in the respective fiues according to the conditions existing in the air terminal spaces or rooms directly affecting the thermo static controls. It will be apparent that the temperature of the air or gas treated with our apparatus may be controlled over a very wide range.

As has been pointed out, it is an important object of the invention to regulate or control the relative humidity of the air or gas. This is accomplished largely by controlling the tempera ture of the spray. To this end, the trough it is supplied with water through a pipe t l mounted adjacent the front wall of the housing and extending up into the space it for. connection with a pipe leading fro'ma source at supply. he flow of water through the pipe ll to the trough is preferably controlled by a float va'ive i8, and an overflow pipe 4% leads through the trough and hous ing to a drain, to which is also connected a drain is also connected by a pipe 55 around strainersv 52 to pipe 58. Valves EV are mounted in pipes ii, iii, 53, 53 and 55, so that the water may be diverted through either one strainer or the other, through pipes 5i, 53 or 55', 53, or through pipe $5, according to which of the valves l-IV are open. Pipe 5% is also connected to a drain branch 55 leading to a sediment pocket 5?. A thermostatic element Gil is installed in the pipe line and may be installed in the pipe 5d leading to the pump P. A pump discharge pipe 66 is connected with branches 62, 63, the former leading to water cooling means which may be the refrigerating apparatus previously referred to, and the latter leading to the water heater $8 in the chamber it and shown in detail in Fig. 10.

An electro-magnetic valve it is mounted in the branch 62 of the pump discharge line, and a simiiar valve 65 is mounted in the branch at of the pump discharge line to the water heater. The operation of these vaives and the means actuat- .ing them will be hereinafter explained in detail, and for the present we would state generally that the electro-magnetic valves 6t, 65, are alternately operated in response to humidistats in the air terminal spaces or elsewhere, or'by other elements as presently explained, so that water I will be drawn from the tank 24 through the strainersby water heater and-thence to the spray nozzle. The

result is that the water sprayed from the nozzle 25 is of predetermined temperature according to the requirements for the humidity of the air which is determined by the setting of humidistat or other control elements as hereinafter pointed and close communication between the extension I on the header 29, and the hot'water heater .36. The same element 68 also operates a valve 8| in the water cooler. The function of controlling the said valves in thewater heater and water cooler":

is to further assure maintenance of proper predetermined humidiflcation of the treatedairas will become more apparent hereinaften.

A relief line BL is connected between pipes 54 and SI. Check valves CV are mounted in the pipes 83'] and 62', leading from the water heater and cooler to the spray nozzle.

walls ,9, as shown in Fig. 4, and below each delivery fiue. The fans'may be rotated by electric motors M arranged in housings 1|. between the fans and having a shaft projecting from each end and connected to the fans. Also, within the fan chamber. is, the transformer I2. Above the fans are plates I3 closing the top of the fan chamber and provided with openings 13 through which the partly treated air is discharged by the .fans. 'We wish it to be understood that the arrangement of fans, motor, and transformer'is purely illustrative and that other means for rotating the fans maybe employedand that such means, may be locatedeither within the housing or on the exterior. The arrangement of the electric motors, transformer; and fans 'within the chamber just described, affords very compact arrangement, and by slidably mounting the plates 18 on angle irons 18', the entire assembly of fans and motors may be removed. v

Bearing'in mind our previous explanation,'that the apparatus shown in thisapplication is purely illustrative, and that for the purpose of convenience and understanding of the invention, we have mentioned that there may be four outlets connectedto conduits "leading to different rooms, and now referring to Fig. 12, the numeral C| designates a thermostat located in one of the rooms, and C2, C3 and C4 designate thermostats located respectively in the other rooms, and each of the thermostats Cl, C2, C3 and C4, being automatically operable in response to temperature -changes to establish or close an electric circuit to operate valves intwo of the secondary heaters.

Referring again to the thermostat Cl, it will be noted that electric wires I5, are also connected to one of the electro-magnets EM, and, wires 16 are also connected to another of the electromagnets EM. The valves in the header" operated by the said electro-magnets may be the ones in Fig, 7 mounted in the extensions b and d.

Assuming that thermostat Cl is set to controlor maintainthe temperature of the air in rooms' or terminalspaces served at 68, and if theair in the said room should drop to a temperature below 68, then the thermostat (II will close circuits through the wires 15 and 16 to the electro-mag- 65' nets to. open valves in the extensions b and d and admit steam to the upper and lower secondary heaters withjwhich the extensions b and d are -connected.- Thus, the temperature of the air passing these secondary heaters through the flue communicating with the particular room will be increased, and as the temperature in the room reaches 68, one of the-secondary heaters will be cut out, that is, either the circuits 15 and 1.8

will be-opened,;and when thetemperature goes above 68? then both of the circuits will be open and operated reverselyfto the above, that is, the valve.

-the valves in the extensions 1) and d will be closed. Any subsequent drop in temperature will cause one of the circuits to be closed to operate one of the valves 35 in either of the extensions b and d. Thus, all of the valves in the respeca predetermined amount of. humidity, which is obtained by controlling the temperature of the spray water and which we may accomplish in several ways. First, a dew-point control element 15- 11 located either in the air-terminal spaces or the dischargeduct of the machine for contactby the air which has passed the primary heaters and coolers through the spray chamber and secondary heaters and coolers, as shown in Fig. 12, is con- 20 nected by wires 18 to the circuit 19 for efiecting simultaneous oper'ation of the valves 64 and 65 in the pump discharge. The dew-point control element is also connected by wires to the circuit 88 for effecting simultaneous operation of the valve 68 controlling the heating medium of the water heater, and the valve 8| controlling the supply of the refrigerant or cooling medium to the water cooler. Assuming that the air contacting the dew-point control .element 11 is of greater humidity than desired, the valve 64 will be opened and the valve 65 closed, so that the water will be pumped through the cooler to the spray nozzle. At the same'time that the valves 64, 65, are .respectively opened'and closed, the 35- valve 66 is also closed and the valve 8| opened, thus supplying refrigerant to the water cooler. If the. condition of the air is such as to call for an increase in humidity, the valves 64, 65, will be 84 will be closed and the valve 65 opened. .When the valve is closed and the valve opened, the valve 66 isalso opened and the valve closed, so that the heating medium is supplied to the water heater through which the water is pumped'to increase its temperature and the humidity content of the air. We would mention at this time that the valves 64, 65 in the pump discharge line are preferably by-passed.,

Still referring to Fig. 12, it will be noted that a humidistat 82 may be provided in any ofthe rooms or air terminal spaces. This element may be set by the owner of the premises or person in charge to control at will the humidity content of the air. This-element 82 is shown connected by 5 wires 83 to circuits 19 for control of the valves 64," 65, and by wires 84 in the circuit 88 for control of the valves 66 and ill. Theoperation of the valves in response to the element 82 wouldbe exactly the same as described in connection with 60 a the dew-point control 'I'|. Preferably either the dew-point control element is provided or the humidistat elements 82 are provided, it not being necessary, nor, we believe, entirely desirable, to provide both.

The element 68 in the pump suction line at.-

' fords another means of controlling the relative be conducted through the cooler and hence to the spray nozzle.

Still referring to Fig.'12, it will be noted that the electro-magnets which operate thevalves in the extensions a, a, on the header 29 to control the admission of the heating medium to the primary heaters 2|, are connected by wires 81 to cool air thermostat 88 which is preferably located in the air inlet conduit for direct contact'with the. entering air. I This thermostat may be set. at any point to operate the electro-magnets'and valves 35 controlling the flow of heating medium to the-primary heaters in response to the temperature of the entering air. It will thus be seen that the entering air may affect the element 88 to cause opening of the valves 35 controlling the. flow of heating medium to the primary heaters,

or the temperature of the air may be such that the valves will not be opened. In eitherevent,

the air is sucked down across the primary heaters and coolers through the baifies 23 and through air or gas.

the turbulent spray or mist at the top of the spray chamber, the temperature of which is maintained and controlled by any of the means here- I inbefore described to humidify or dehumidify the The air then passes on through the openings 26 in-the walls 9, through the fans and past the secondary heaters and coolers in the several fiues to the terminal space or rooms. If

the dew-point control 1! is within the discharge ducts it will function as previously described.

The air entering the terminal space or rooms,

will, of course, contact the thermostatic elements Cl, C2, C3 and C4, which may open and close the valves V controlling the respective secondary heaters.

It is obvious that a machine or apparatus may 2 be furnished complete in the forms shown in Figs. 1, 2 and 11 with all of the parts assembled in compact form, it only being necessary when the de numerous alterations and modifications may be.

made at will. For instance, the primary and secondary heaters may be in the nature of coils such as shown and described, or heavy. straight pipe provided with surface extension fins and connected to suitable headers, the dimensions being such as to fit within the flues. We also wish it to be understood that a machine constructed in accordance with our invention and embodying the features above described may be made in various sizes or shapes to supply requisite amount of conditioned air to any number of rooms or to large auditoriums, factories and the like. We believe that for all commercial purposes it may be best to build the machines of a standard size and capacity to supply a predetermined amount of conditioned air to areas of predetermined size, and if the area to be supplied is greater than the ca-- pacity of the machine, to simply accumulate two or more machines which may be arranged side by side as shown in Fig. 13. A single source of supply of heating medium for the primary heaters, is secondary heaters, and spray water, will serve any number of machines, and the same is true of the refrigerant and water and electric supply.

In the description of the operation of themachine in connection with Fig. 12, we do not deem it necessary to describe the primary and secondary coolers, as these can be operated and con-I trolled in the same manner as the primary and secondary heaters. If the apparatus is to serve asa heating plant the cooling coils in the fines and stacks may be omitted, and only the heaters installed, such arrangement being shownin Fig. 11.

The motors for rotating the fans and the pump would preferably be provided with variable speed controls. Furthermore, we deem it advisable to provide both manual and automatic means for starting and stopping the motors. Such automatic means might be .a temperature responsive element located for contact by the air, and which, should the air reachan undesired temperature will, through proper electric circuit in which the element and motors are connected, stop operation or the motors.

The flow of the air in a direction opposite to the flow of the spray is especially important in connection with the construction and. arrangement of the spray chamber and the projection of the spray accomplishing atomization or impact expansion of the spray by its impingement against the top of the chamber, whereby the spray is broken into a finer mist than otherwise possible and through which the entering air must pass to effect uniform and thorough coadmixture, or absorption by the air. Since the invention is well adapted to the production of a low pressure apparatus, it is preferable to provide for the downward flow of air directly against the upward flow of spray water and through the mist created by the impingement or impact of the water 46 against the parts at the top of the chamber, and

this arrangement as previously explained, provides for handling a great volume of air in a relatively small space, and operating at low pressure.

We claim:

1. Air conditioning apparatus comprising a unitary housing having an air inlet, a heater in said housing disposed in the path of the entering air, a spray chamber in the bottom of said casing, means to project a spray of water in said chamber in a direction opposite to the direction in which the air enters said chamber and with great turbulence at the portion of said chamber which the air first enters, delivery flues com- 60 municating with said spray chamber, means to draw air through said inlet and spray chamber and to deliver it through said fiues, heaters in said fiues, means to regulate the temperature of the spray water in response to the humidity of iL-i the delivered air, means to automatically regulate the temperature of the heaters in said flues in response to the temperature of the delivered air, and means to regulatethe temperature of the heater in the housing in response to the temperature of the entering air.

2. Air conditioning apparatus comprising a housing, a spray chamber within said housing, an air inlet leading into said spray chamber,

means to create a turbulent spray of water in 15 either through said heater or through said cooler,

portion of the chamber which the air first enters,

a water heater, a water cooler, means automatically operable in response to the humidity of the air which has passed through said spray chamber to cause the water to be sprayed -to flow means to cool the air in advance of entry into the spray chamber, and meansresponsive to the temperature of the entering air to control said air cooling means.

3. Air conditioning apparatus comprising a housing, a spray chamber within said housing, an air inlet leading into said spray chamber,

I means to createa turbulent spray of water in said chamber with greatest turbulence at the portion of the chamber which the air first enters, a water heater, a water cooler, means automatically operable in response to the humidity ofsthe, air which has passed through said spray chamber to'cause the water to be sprayed to flow either through said heater or through said cooler,

means to heat the air in advance of entry into the sprayv chamber, and means responsive to the temperature of. the entering air to control said air heating means,

4. Air conditioning apparatus comprising a unitary housing having an air inlet and a plu- ,rality of air outlets for connection respectively with a conduit to conduct air into the housing and conduits to conduct the air away from-said housing, a spray chamber within the housin communicating with said air inlet, flues communicating with each said outlets and with said spray chamber, means to cause the air to flow through said inlet, spray chamber and flues,

means to heat the entering air, means to cool the" entering air, an air heater in each of saidflues, an air cooler in each of the flues, and means responsive to the temperature of the areas to which the air is delivered from said outlets and flues to control the air heaters and coolers in the respective flues.

5. Air" conditioning apparatus comprising a housing having an air inlet and a plurality of air outlets for connection respectively with a conduit to conductthe air into the housing and conduits to conduct the air away from the housing to spaces to be served, a spray chamber within the housing communicating with said air inlet,

'means to project the spray of water toward the air inlet in a direction opposite to the direction in which the airtravels when entering the spray chamber, means to accomplish atomization oi the spray in the region of the chamber which the air.

9,023,622 said chamber with greatest turbulence at th e first enters, flues communicating with each oi said outlets and with the spray chamber, means to cause the air to flow through said inlet," spray chamber and flues, an air heater in'each of said flues, means responsive to the temperature of the spaces to which the air is delivered to control the air heaters in the respective flues, an air heater disposed in the path or the entering air iii advance oi the spray chamber, means to control the'temperature of said heater, and means 10 responsive to the humidity of the air passing from said outlets to control the temperature of the spray. a

6. Air conditioning apparatus comprising a housinghaving-an air inlet and a plurality of air outlets for connection respectively with a conduit to conduct the air into the housing and conduits to conduct the air away from the housing to spaces to be served,'a spray chamber within the housing communicating with said air inlet,

means to project the spray of water toward the air inlet in a direction opposite to the direction in which the air travels when entering the spray chamber, means to accomplish atomization oi the spray in the'region of the chamber which the air first enters, flues communicating with each of said outlets and with the spray chamber, means to cause the air to flow through said inlet,

spray chamber, and flues, an air heater disposed in the'path of the entering air in advance of the spray chamber, and means to control the temperature ofxsaid last heater.

'7. Air conditioning apparatus comprising a housing having an air inlet and a plurality of air outlets for connection respectively with a 3 conduit to conduct the air into the housing and conduits to conduct the air away'irom the housing to spaces to be served, a spray chamber within the housing communicating 'withsaid air inlet, means to project the spray of water toward 4 the air inlet ina direction opposite to the direction in which the air travels when entering the spray chamber, means to accomplish atomization of the spray in the region of the chamber which the air first enters, flues communicating with each of said outlets and with the spray 

